Hi M-3,
Chris is right. It is not being discontinued. However, at some point in time, it will. On the Kurzweil mailing list, someone from Kurzweil (I think it was Mike Martin but am not completely sure), said that 3.87 will most likely be the last OS version for this synth/sampler.
That does not mean that Kurz will not make anymore. It just means that there will be no further development. Stepping up to the K2500 and K2600 is quite a leap in terms of $$$. If you don't have that kind of money but like the sound of the K2000VP and its features, then don't hesitate. The Kurz's are quite powerful as they are.
If you are curious, you can search the archive for the mailing list. That particular message came in about a month or 2 ago. I believe the searchable archives link can be found at Tony Palermo's launchpad site (link here on SynthZone to that site).
HTH,
Fernando